During a state visit to France, King Alexander I of Yugoslavia was assassinated in Marseille alongside Louis Barthou, the French Foreign Minister. The assassin, a member of the Ustashe, a Croatian nationalist organization, approached the officials while they were in an open motorcade. In the midst of a growing nationalist sentiment in the region, this attack aimed to destabilize Yugoslavia and assert Croatian independence. The weapon used was a pistol, and the violence unfolded before shocked witnesses, including police and government officials. Following the assassination, the French authorities quickly apprehended the assassin, but the incident sparked widespread outrage and had significant implications for Yugoslav-French relations.The assassination of King Alexander was not merely an attack on two political figures but symbolized the turbulence in the Balkans during the early 20th century. These tensions were exacerbated by nationalistic movements and the disintegration of empires after World War I. King Alexander's death led to a power vacuum and a series of political shifts within Yugoslavia, making it difficult for the government to maintain stability and pursue its objectives. The event also heightened security at international gatherings and reshaped diplomatic interactions in the Mediterranean region, as nations reevaluated their approaches to national security against such violent extremism.